Comprehensive side-by-side LLM comparison
GPT-5 leads with 25.5% higher average benchmark score. GPT-5 offers 265.9K more tokens in context window than DeepSeek-V3. DeepSeek-V3 is $9.88 cheaper per million tokens. GPT-5 supports multimodal inputs. Overall, GPT-5 is the stronger choice for coding tasks.
DeepSeek
DeepSeek-V3 was introduced as a major architectural advancement, developed with 671B mixture-of-experts parameters and trained on 14.8 trillion tokens. Built to be three times faster than V2 while maintaining open-source availability, it demonstrates competitive performance against frontier closed-source models and represents a significant leap in efficient large-scale model design.
OpenAI
GPT-5 represents the next generation of OpenAI's foundational models, developed to advance the frontier of AI capabilities in reasoning, knowledge, and general intelligence. Built to push beyond the limitations of GPT-4, it incorporates architectural and training improvements designed to enhance performance across diverse tasks and domains.
7 months newer

DeepSeek-V3
DeepSeek
2024-12-25

GPT-5
OpenAI
2025-08-07
Cost per million tokens (USD)

DeepSeek-V3

GPT-5
Context window and performance specifications
Average performance across 4 common benchmarks

DeepSeek-V3

GPT-5
Performance comparison across key benchmark categories

DeepSeek-V3

GPT-5
GPT-5
2024-09-30
Available providers and their performance metrics

DeepSeek-V3
DeepSeek

GPT-5

DeepSeek-V3

GPT-5

DeepSeek-V3

GPT-5
OpenAI
ZeroEval